Magnetisation density and electronic structure of Sr<sub>3</sub>Ru<sub>2</sub>O<sub>7</sub>.

ORAL

Abstract

Sr3Ru2O7 is itinerant metamagnet, exhibiting a sharp increase in magnetisation in a field of 5.5 – 7.7 T (depending on the applied field direction) at temperatures around 1 K. This metamagnetic transition is thought to be related to the behaviour of the density of states near the Fermi level. We have performed a study of the magnetisation density in the metamagnetic state combining a magnetic Compton scattering experiment with electronic structure calculations. Our initial density functional calculations were fixed to reproduce the value of the experimentally determined spin moment, but do not agree well with the experimentally measured spin density. In the talk, we will show how it is possible to gain a good agreement with the experimental spin densities from the calculations and the consequences of this in relation to the electronic structure and underlying physics.

*We are very grateful to the Japan Synchrotron Radiation Institute (JASRI) for providing beamtime at SPring-8 via projects 2012B0045 and 2016A0131.

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Presenters

  • Jonathan Duffy

    • Department of Physics, University of Warwick, United Kingdom
    • University of Warwick

Authors

  • Jonathan Duffy

    • Department of Physics, University of Warwick, United Kingdom
    • University of Warwick

  • Stephen Dugdale

    • HH Wills Physics Laboratory, University of Bristol, United Kingdom
    • University of Bristol

  • Sean Giblin

    • School of Physics and Astronomy, Cardiff University
    • Cardiff University
    • School of Physics and Astronomy, Cardiff University, United Kingdom
    • University of Cardiff

  • Jonathan Taylor

    • DMSC, European Spallation Source, Denmark
    • European Spallation Source

  • Robin S. Perry

    • University College London
    • Physics Department, University College London
    • UCL
    • London Centre for Nanotechnology and UCL Centre for Materials Discovery, University College London

  • Yoshiteru Maeno

    • Department of Physics, Kyoto University
    • Dept. of Physics, Kyoto University
    • Department of Physics, Graduate School of Science, Kyoto University, Kyoto, Japan
    • Kyoto University
    • Department of Physics, Graduate School of Science, Kyoto University
    • Department of Physics, Kyoto University, Kyoto 606-8502, Japan
    • Department of Physics, Kyoto University, Japan

  • Matthew Butchers

    • University of Bristol

  • Ted Forgan

    • University of Birmingham